NCERT Solutions Physics Class 11th: Download Chapter wise Questions & Answers PDF

ncert solutions physics class 11th 2023

Updated on Sep 15, 2023 13:51 IST

NCERT Solutions Physics Class 11th is an excellent resource to enhance the understanding of Class 11 Physics. The candidates can access the NCERT Solutions for Class 11 Physics by clicking on the links given on this page. These solutions are provided by highly experienced subject matter experts who have explained even the most intricate concepts in an easily understandable manner.

NCERT Solutions Physics Class 11 comprises numerous concepts and numerical problems. The subject experts have clearly explained the concepts involved in solving each numerical and this helps the students to solve the numerical problems effortlessly. It is recommended that candidates actively engage in solving and reviewing NCERT Solutions Physics Class 11th to achieve excellent scores in their final examinations. Additionally, the candidates preparing for entrance exams such as JEE, JEE Advanced, and NEET must refer to NCERT Solutions Physics Class 12 to score well in the entrance exams. 

NCERT Physics Class 11th Solution PDF

NCERT Solutions Physics Class 11th has been prepared based on the latest syllabus prescribed by the CBSE board. The candidates can download the Physics Ncert Class 11 PDF for all chapters. In NCERT Solutions for Class 11 Physics, students will learn a range of concepts that are crucial from both exam and competitive exam perspectives.

Sr. No.

Physics Class XI Chapters


Physical World


Units and Measurements


Motion in a Straight Line


Motion in a Plane


Laws of Motion


Work, Energy, and Power


System of Particles and Rotational Motion




Mechanical Properties of Solids


Mechanical Properties of Fluids


Thermal Properties of Matter




Kinetic Theory





NCERT Class XI Physics Chapters Overview

Chapter 1: Physical World

Physical World refers to the actual world that we live in. It can be perceived by our five senses and is subject to certain rules known as physical sciences and laws of nature. Understanding the laws and sciences that govern this physical world is important. Using a select few principles and laws, physics aims to explain a broad variety of physical phenomena. The idea is to see the physical world as an illustration of general principles that apply in various situations. Newton's law of gravitation, for instance, explains how an apple falls, how the moon orbits the Earth, and how planets move around the sun.

Chapter 2: Units and Measurements

In order to measure physical quantities such as length, mass, and time, we need a standard measurement, which is known as the unit of that physical quantity. For example, the unit of length is metres. How many times this standard unit of length is contained within the length of the object is what is measured when finding the length of an object. The result of a measurement of a physical quantity is expressed by a number accompanied by a unit.

Chapter 3: Motion in a Straight Line

In Physics, motion is defined as the phenomenon in which an object experiences a shift in position over a particular period of time. Motion can be mathematically described in terms of a number of different factors, including displacement, distance, velocity, speed, acceleration, and time. Identifying the frame of reference to which an item is attached is necessary in order to observe motion. Motion is measured based on changes in the object's location in relation to the frame of reference. In this chapter we will learn about the motion of the objects in a straight line, it is also called rectilinear motion.

Chapter 4: Motion in a Plane

When we speak of motion in a plane, we are speaking of motion in two dimensions since the plane is defined by two dimensions. Therefore, we should consider two axes, usually we consider X-axis and the Y-axis. This chapter includes topics like projectile motion, uniform circular motion etc.

Chapter 5: Laws of Motion

Sir Isaac Newton formulated the laws of motion, which explain the relation between the forces that act on the object and the changes caused by the force. The understanding of laws of motion is the foundation for Modern Physics. There are three laws of motion.

Chapter 6: Work, Energy, and Power

In physics, the term work has a precise definition. Work is the application of force, to move an object over a distance, in the direction of the applied force. There is a close relationship between work and energy. When an object is moved by the application of work, its energy changes. In essence, energy is the capacity to do work. Power is defined as the time rate at which work is done or energy is transferred

Chapter 7: System of Particles and Rotational Motion

In physics, the system of particles is the sum of more than one specific particle. This chapter will focus on the motion of a system as a whole. The main concept here would be the centre of mass of a system of particles.

Chapter 8: Gravitation

Gravitational force is the attractive force between two objects with mass. This force always pulls the masses towards each other and never pushes them apart, hence it is referred to as an attractive force. Gravitational force is explained using Newton's Universal Law of Gravitation.

Chapter 9: Mechanical Properties of Solids

Mechanical properties of solids explain the properties such as strength and resistance to deformation when a force is applied to solids. Strength is the ability to withstand the stress that is applied to the solid. Elasticity, plasticity, and strength are examples of mechanical properties.

Chapter 10: Mechanical Properties of Fluids

Fluids are substances that have the ability to flow. Liquids and gases are examples of fluids. Unlike solids that have a specific shape and volume, fluids do not have a definite shape and take on the shape of the container. The mechanical properties of fluids are the branch of physics that focuses on the characteristics and behaviour of fluid materials. This chapter includes topics like pressure, Pascal's law, streamline flow, Bernoulli's principle, and many more.

Chapter 11: Thermal Properties of Matter

Matter is defined as a substance that possesses both mass and occupies space. Temperature is among the physical properties of matter. The thermal properties of matter are the behaviour of matter under thermal conditions. Thermal conductivity, and thermal diffusivity are thermal properties of matter. This chapter will include topics like temperature, heat and thermal energy.

Chapter 12: Thermodynamics

Thermodynamics is the science that deals with the principles of heat and temperature and how heat can be converted into other forms of energy. The four laws of thermodynamics regulate the behaviour of these quantities. This chapter includes topics like laws of thermodynamics, Heat engines, Carnot engines etc.

Chapter 13: Kinetic Theory

The behaviour of gases can be explained by the kinetic theory, which is based on the idea that gases are comprised of atoms or molecules that move rapidly. This theory is applicable to gases because the inter-atomic forces, which are significant in solids and liquids, can be disregarded in gases. This chapter includes topics like the behaviour of gases, the law of equipartition of energy etc.

Chapter 14: Oscillations

Oscillation is the repeated two-and-forth movement of an object between two positions or states. This type of motion is periodic, meaning it repeats itself in a regular cycle, as exemplified by a sine wave, the back-and-forth swing of a pendulum, or the up-and-down motion of a spring-loaded weight. The oscillation takes place around an equilibrium point or a mean value and is often referred to as periodic motion. A full oscillation is considered to occur when the object completes one cycle of motion, whether it is a side-to-side or up-and-down movement. The chapter includes numerical problems from topics like velocity and acceleration in simple harmonic motion, energy in simple harmonic motion etc.

Chapter 15: Waves

Waves are defined as patterns that propagate without the actual transfer or flow of matter. Waves transport energy, and the pattern of disturbance contains information that propagates from one point to another. Communication systems rely heavily on the transmission of signals through waves. This chapter includes topics like beats, the Doppler effect etc.

NCERT Class 11 Physics Solutions and FAQs

Q1: What are the chapters covered in the Class 11 Physics NCERT textbook?

A1: The Class 11 Physics chapters as per the NCERT textbook are Physical World, Units and Measurements, Motion in a Straight Line, Motion in a Plane, Laws of Motion, Work, Energy and Power, System of Particles and Rotational Motion, Gravitation, Mechanical Properties of Solids, Mechanical Properties of Fluids, Thermal Properties of Matter, Thermodynamics, Kinetic Theory, Oscillations, and Waves.

Q2: Which chapters are considered the most important in the Class 11 Physics NCERT textbook for Class 11 exams?

A2: Laws of Motion, Work, Energy and Power, System of Particles and Rotational Motion, Gravitation, Thermodynamics, and Waves are some of the most important topics in the Class 11 Physics NCERT textbook. However, all of the chapters in the Class 11 Physics NCERT textbook are important. To score well in the board exam and competitive exams the candidates must learn all the chapters thoroughly.

Q3: How to score good marks in Class 11 Physics?

A3: To score good marks in Class 11 Physics, you should study the NCERT textbook thoroughly, understand the concepts, and practise the numerical problems. You can also solve previous years' question papers and sample papers to get an idea about the pattern of the exam. Solving past years’ question papers helps the students understand the exam pattern, know what are the frequently asked questions etc.

Q4: Is it necessary to solve the examples and exercises given in the NCERT Physics textbook?

A4: Yes, it is necessary to solve the examples and exercises given in the NCERT Physics textbook as they help you understand the concepts and also improve your problem-solving skills. All the exercise questions solved by the subject experts are available here for the reference of the students. You can also refer to additional reference books for more practice.

Q5: Which reference books are recommended for Class 11 Physics exam preparation?

A5: The students must learn all the chapters thoroughly from NCERT textbooks to score well in the CBSE exam and entrance exams. To prepare for competitive exams like JEE, NEET and other exams the students must refer to a few other books also. Some of the recommended reference books for Class 11 Physics are Concepts of Physics by HC Verma, Fundamentals of Physics by Halliday, Resnick and Walker, Understanding Physics by DC Pandey, and NCERT+ Exemplar Practice Questions with Solutions.

Q6: What is the weightage given for the various chapters from Class 11 Physics in the final exam?

A6: The weightage of chapters in the NCERT Class 11 Physics syllabus varies from year to year, and it is subject to change. However, based on past trends, the following is an estimated weightage of chapters in the board exams:

  • Physical World, Units and Measurements, Motion in a Straight Line, Motion in a Plane, Laws of Motion - 23 marks
  • Work, Energy, and Power, System of Particles and Rotational Motion, Gravitation – 17 marks
  • Mechanical Properties of Solids and Mechanical Properties of Fluids, Thermal Properties of Matter, Thermodynamics and Kinetic Theory – 20 marks
  • Oscillations and Waves – 10 marks

Q7: Which are the topics covered in Class 11 Physics Chapter 1 Gravitation?

A7: The topics covered in Class 11 Physics Chapter 1 "Gravitation" are:

  • Introduction to gravitation
  • Kepler’s laws
  • Universal law of gravitation
  • The gravitational constant
  • Acceleration due to gravity of the earth
  • Acceleration due to gravity below and above the surface of earth
  • Gravitational potential energy
  • Escape speed
  • Earth satellites
  • Energy of an orbiting satellite
  • Geostationary and polar satellites
  • Weightlessness

These topics primarily deal with the concepts of gravitation, its laws, and its effects on objects in the universe.

Q8: How many marks are allotted for the practical exam in the CBSE Class 11 Physics?

A8: For Class 11 Physics, the practical exam is conducted for 30 marks. The practical exam is designed to test the laboratory skills of the students and their ability to perform experiments and handle laboratory equipment.

  • Two experiments one from each section -  7+7 marks
  • Practical record (experiment and activities) - 5 marks
  • One activity from any section - 3 marks
  • Investigatory Project - 3 marks
  • Viva on experiments, activities and projects – 5 marks

Q9: Which units have the maximum weightage in NCERT Class 11 Physics?

A9: In the NCERT Class 11 Physics syllabus, all the chapters are important and carry significant weightage. However, if we look at the weightage of each chapter in the context of the examination, we can say that the first unit I, unit II and unit III have the maximum weightage in the Class 11 Physics syllabus. The questions are asked for 23 marks from these units in CBSE exam. The chapters included are:

  • Physical World
  • Units and Measurements
  • Motion in a Straight Line
  • Motion in a Plane
  • Laws of Motion

Q10: What is the marks distribution for the CBSE Theory exam and practical exams for Class 11?

A10:  According to the CBSE Syllabus for Class 11, the theory exam constitutes 70 marks, while 20 marks are allotted for the practical exam, making the total marks for Class 11 Physics 100. If students plan and work hard, they can achieve full marks in the Physics exam. To achieve this, it is recommended that they thoroughly study and revise the NCERT solutions for Class 11 Physics.

Q11: What is the weightage given for numerical problems in the Class 11 Physics CBSE exam?

A11: Numerical problems are given a lot of weight in the CBSE Class 11 Physics exam. Although the weightage given to numerical problems may change from year to year, they typically make up between 30% and 40% of the overall marks. The importance assigned to numerical problems stems from the fact that they assess a student's capacity to apply theoretical concepts to solve practical problems. To do well on the exam, students should frequently practise solving numerical problems.

Q12: Is Class 11 physics difficult?

A12: Yes, Class 11 Physics syllabus is often regarded as the most challenging among all subjects by many students. It is characterised by its high level of difficulty, complexity, and comprehensiveness, particularly when compared to the Physics syllabus of Class 10. Class 11 physics is considered to be more challenging than the previous classes, as it introduces several new concepts and mathematical techniques. Class 11 physics typically covers topics such as kinematics, laws of motion, work, power, energy, gravitation and thermodynamics among others. These concepts often require a solid understanding of mathematics, including algebra, trigonometry, and calculus.

Q13: How to make 11 physics easy?

A13: These are a few steps to make Class 11 Physics easy to learn

  • Create a dedicated notebook for each chapter and jot down the crucial points, such as definitions, concise explanations, formulas, diagrams, and equations.
  • After studying a chapter, attempt the practice questions provided at the end. Make a note of challenging questions to revise and practice them later.
  • Recognize that mathematics plays a fundamental role in physics. Developing proficiency in fundamental mathematical concepts will greatly enhance your ability to tackle physics problems effectively.
  • Simplify complex situations by breaking them down into smaller, more manageable components.
  • Utilize drawings and diagrams to visualize and better understand physics concepts.
  • Always double-check your answers to ensure accuracy and avoid careless mistakes.
  • Take advantage of all available sources of physics help, such as textbooks, online resources, and discussions with teachers or classmates.  This can provide additional insights and help solidify your conceptual knowledge.

Q14: Which chapter of physics is very easy class 11?

A14: Newton's Laws of Motion, Units and Measurements, Motion in one Dimension, Mechanical Properties of Solids, Mechanical Properties of Fluids, and Kinetic Theory of Gases are relatively easier chapters in Class 11 Physics. These chapters have straightforward concepts that are easier to grasp. The candidates can focus on these Class 11 chapters for JEE, NEET and other entrance test preparation. 

Q15: How to get 100 in physics?

A15: Scoring a 100 in Physics requires significant dedication and hard work. To attain a perfect score, consider the following key points:

  • Dedication and Hard Work: It is essential to commit yourself to consistent and rigorous studying. Allocate sufficient time for regular studying and revision. Maintain discipline throughout your preparation.
  • Understanding of the Syllabus: Ensure a solid grasp of the entire CBSE Physics syllabus. Thoroughly comprehend the topics and identify areas that require additional attention. Plan your study schedule accordingly.
  • Practise Past Years Question Papers: Analyse previous years' question papers to identify common question patterns and types. This analysis will help you effectively prepare and manage your time during the exam. Engage in solving sample papers that adhere to the latest exam format. This practice will familiarise you with the exam pattern, enhance your time management skills, and boost your confidence.
  • Mastery of Derivations: Derivations hold significant importance in the Physics exam. Understand them deeply, including the logical steps involved. Practice writing derivations multiple times to reinforce your understanding.

By following these guidelines and maintaining a dedicated study routine, you can increase your chances of achieving a perfect score in CBSE Physics.

Q16: How can I get full marks in physics?

A16: Scoring full marks in Physics requires a focused and systematic approach. Here are some tips to help you achieve that goal:

  • Thoroughly Understand the Concepts: Develop a deep understanding of the fundamental concepts and principles in Physics. Pay attention to the details and ensure clarity in your understanding.
  • Follow a Structured Study Plan: Create a well-structured study plan that allocates time for each topic. Break down your study sessions into smaller, manageable segments and revise regularly.
  • Practice Numerical Problems: Physics involves numerical problem-solving. Practice a wide range of numerical problems from different chapters to strengthen your problem-solving skills. Pay attention to units, significant figures, and the correct application of formulas.
  • Work on Derivations and Diagrams: Derivations and diagrams hold importance in the Physics exam. Practice writing derivations and drawing diagrams accurately. Understand the logical steps involved in derivations and their applications.
  • Solve Previous Years' Question Papers: Solve previous years' question papers to understand the exam pattern, question types, and time management. This practice will familiarize you with the format and help you identify areas of improvement.
  • Practice Time Management: Develop efficient time management skills during the exam. Practice solving questions within the allotted time to improve your speed and accuracy.

Q17: Why is physics hard?

A17:Physics can be hard due to various factors:

  • Theoretical principles need validation through experimental results.
  • Critical thinking is a fundamental component.
  • A solid foundation in mathematics is essential, as even minor mistakes can disrupt the process of deriving equations.
  • A thorough grasp of the laws governing the subject is necessary.
  • Problem-solving skills are vital for success in physics.
  • Physics often deals with abstract concepts.
  • Proficiency in drawing and interpreting graphs is crucial.
  • It is a cumulative discipline, where understanding new concepts relies on understanding previous ones.

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